1. Chayen, J., Bitensky, L., Butcher, R. G., and Poulter, L. W., Nature, 222, 281 (1969).
2. Handbook for Chemical Society Authors (The Chemical Society, London, 1960).
3. Florkin, M., and Stotz, E. H. edit., Comprehensive Biochemistry, 13, second ed. (Elsevier Publishing Co., Amsterdam, 1965).
4. McCabe, M., and Chayen, J., J. Roy. Microscop. Soc., 84, 361 (1965).
5. Dingle, J. T., Proc. Roy. Soc. Med., 55, 109 (1962).